As long as you are good with injecting every day, 100mg ED is fine for prop, if that's the dose of test that you are used to. This will require being comfortable with injecting many sites. I'm not sure why you are running tren by itself at the end of the cycle. Why no add it in to the last 5 wks of the existing 16 wk frame work? If you really want to make this cycle 20 wks, you will want to continue taking test through 20 wks. I'm not sure how experienced you are with gear, but 20 wks is a long time...we're talking about 1/2 year. With the length that you are planning to be on, this cycle is probably going to be hard to recover from. Here is my suggestion
1-16
EQ and an AI
1-8
sust
9-16
prop
11-16
tren ace
PCT starts a few days after your last inject